Titanium is as strong as steel but much less dense. It is therefore important as an alloying agent with many metals including aluminium, molybdenum and iron. These alloys are mainly used in aircraft, spacecraft and missiles because of their low density and ability to withstand extreme temperatures.
A large use of titanium is in the form of titanium (IV) oxide. It is extensively used as a pigment in paint, plastics, enamels, paper and even sunscreen. It is a bright white pigment with excellent covering power. It is also a good reflector of infrared radiation.
Titanium has excellent resistance to corrosion in seawater and is used in desalination plants and to protect the hulls of ships, submarines and other structures exposed to seawater. Power plant condensers also use titanium pipes because of their resistance to corrosion.
Titanium has also found surgical applications such as in joint replacements (especially hip joints) and tooth implants as the metal connects well with bone.